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Home >> Chevrolet >> 1998 >> Corvette V8-5.7L VIN G >> Repair and Diagnosis >> Powertrain Management >> Computers and Control Systems >> Throttle Position Sensor >> Service and Repair >> Idle Learn Procedure >> With Automatic Transmission
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With Automatic Transmission

Anytime the PCM or the battery is disconnected or the PCM looses power, the PCM's learned idle position is lost. The engine idle is unstable when the learned idle position is lost.

Perform the following procedure in order to return the learned idle to the correct position:

PROCEDURE
1. Turn OFF the ignition.
2. Restore the PCM battery feed.
3. Turn OFF the A/C controls.
4. Set the parking brake and block the drive wheels.
5. Start the engine.
6. Shift the transmission selector into the drive range.
7. Allow the engine to idle for 5.0 minutes.
8. Turn on the A/C controls.
9. Allow the engine to idle for 5.0 minutes.
10. Shift the transmission selector into the park range.
11. Allow the engine to idle for 5.0 minutes.
12. Turn off the A/C controls.
13. Allow the engine to idle for 5.0 minutes.
14. Turn OFF the engine for 30 seconds.

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